The anthem being sung by protesters on the streets of Belarus has a story that starts in 1960s Spain, during the regime of General Franco. It was written by a Catalan singer-songwriter and is a call for unity of action to achieve freedom. Since then it has had several new lives in different countries, where many are unaware of its origins. BBC Mundo’s Enric Botella, who’s from Catalonia, tells the story.

Picture: Iranian women in Tehran

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